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const std = @import("std");
const h = @import("e2e_harness.zig");
const Harness = h.Harness;
const linux = std.os.linux;
const samples = 5;
const payload_len = 64;
fn nowNs() u64 {
var ts: linux.timespec = undefined;
_ = linux.clock_gettime(linux.CLOCK.MONOTONIC, &ts);
return @intCast(ts.sec * 1_000_000_000 + ts.nsec);
}
fn fillPayload(buf: *[payload_len]u8, sample: usize) []const u8 {
const alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
for (buf, 0..) |*ch, i| ch.* = alphabet[(i + sample * 13) % alphabet.len];
var marker_buf: [16]u8 = undefined;
const marker = std.fmt.bufPrint(&marker_buf, "ZTPERF{d}END", .{sample}) catch unreachable;
const start = payload_len - marker.len;
@memcpy(buf[start..][0..marker.len], marker);
return buf[start..payload_len];
}
fn clickBodyRow(hs: *Harness, screen_row: usize) !void {
var seq_buf: [64]u8 = undefined;
const seq = try std.fmt.bufPrint(&seq_buf, "\x1b[<0;3;{d}M\x1b[<0;3;{d}m", .{ screen_row, screen_row });
try hs.send(seq);
}
pub fn main(init: std.process.Init) !void {
const gpa = init.gpa;
const args = try init.minimal.args.toSlice(init.arena.allocator());
if (args.len != 2) {
std.debug.print("usage: {s} <pardes-exe>\n", .{args[0]});
return error.BadArgs;
}
var hs = try Harness.initArgs(gpa, args[1].ptr, 24, 80, "--tty");
defer hs.deinit();
try hs.expectWaitFor("sy /", 6000, "--tty did not start in tty mode");
try hs.send("clear\r");
try hs.pump(900);
try hs.send("\x02");
try hs.expectWaitFor("nm /", 6000, "Ctrl-b did not leave tty mode");
var best_us: u64 = std.math.maxInt(u64);
var total_us: u64 = 0;
std.debug.print("tty-edit-perf backend=vaxis samples={d} chars_per_sample={d}\n", .{ samples, payload_len });
var sample: usize = 0;
while (sample < samples) : (sample += 1) {
const row = 5 + sample * 3;
try clickBodyRow(&hs, row);
try hs.pump(80);
try hs.send("i");
try hs.expectWaitFor("in /", 3000, "failed to enter insert mode");
var payload_buf: [payload_len]u8 = undefined;
const marker = fillPayload(&payload_buf, sample);
const t0 = nowNs();
try hs.send(&payload_buf);
try hs.expectWaitFor(marker, 10_000, "typed marker never appeared");
const elapsed_us = (nowNs() - t0) / 1000;
best_us = @min(best_us, elapsed_us);
total_us += elapsed_us;
std.debug.print(" sample {d}: elapsed_us={d} us_per_char={d}\n", .{
sample + 1,
elapsed_us,
elapsed_us / payload_len,
});
try hs.send("\x1b");
try hs.expectWaitFor("nm /", 3000, "failed to leave insert mode");
}
std.debug.print("tty-edit-perf summary: best_us={d} avg_us={d} best_us_per_char={d}\n", .{
best_us,
total_us / samples,
best_us / payload_len,
});
}
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